Orbiting a pulsar in the Milky Way's Serpens, or Snake, constellation, may be the most beautiful planet you"ll ever lay eyes on. It is certainly the most valuable. This rock is about five times the diameter of Earth and made almost entirely of diamond....

Cygnus X hosts many young stellar groupings. The combined outflows and ultraviolet radiation from the region's numerous massive stars have heated and pushed gas away from the clusters, producing cavities of hot, lower-density gas....